Question

factorise each of the following polynomials by regrouping.

1) x³ - 2x² + 4x - 8 ​

Answer 1

Answer:

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Answer 2

EVALUATION★

• $= x {}^{3} - 2x {}^{2} + 4x - 8$

• take common x and 4

• $= x(x - 2) + 4(x - 2) \\ \\ \\ = (x + 4)(x - 2) \\ \\ \\ x = - 4 \: \: and \: 2$
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